Search Results - "Garcia Raffi, Luis Miguel"

Sound Absorption and Diffusion by 2D Arrays of Helmholtz Resonators by Herrero-Durá, Iván, Cebrecos, Alejandro, Picó, Rubén, Romero-García, Vicente, García-Raffi, Luis Miguel, Sánchez-Morcillo, Víctor José

“…We report a theoretical and experimental study of an array of Helmholtz resonators optimized to achieve both efficient sound absorption and diffusion. The…”
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Sharp acoustic vortex focusing by Fresnel-spiral zone plates by Jiménez, Noé, Romero-García, Vicent, García-Raffi, Luis M., Camarena, Francisco, Staliunas, Kestutis

“…We report the optimal focusing of acoustic vortex beams by using flat lenses based on a Fresnel-spiral diffraction grating. The flat lenses are designed by…”
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Formation of high-order acoustic Bessel beams by spiral diffraction gratings by Jimenez, Noe, Pico Vila, Rubén, Sánchez Morcillo, Victor José, Romero García, Vicenç, Garcia Raffi, Luis Miguel, Staliunas, Kestutis

“…The formation of high-order Bessel beams by a passive acoustic device consisting of an Archimedes' spiral diffraction grating is theoretically, numerically,…”
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Nonlinear focusing of ultrasonic waves by an axisymmetric diffraction grating embedded in water by Jiménez, N., Romero-García, V., Picó, R., Garcia-Raffi, L. M., Staliunas, K.

“…We report the nonlinear focusing of ultrasonic waves by an axisymmetric diffraction grating immersed in water. In the linear regime, the system presents high…”
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Nonlinear self-collimated sound beams in sonic crystals by Hamham, El Mokhtar, Jiménez, Noé, Picó, Rubén, Sánchez-Morcillo, Víctor J., García-Raffi, Lluís M., Staliunas, Kestutis

“…We report the propagation of high-intensity sound beams in a sonic crystal, under self-collimation or reduced-divergence conditions. The medium is a fluid with…”
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Enhancement of sound by soft reflections in exponentially chirped crystals by Cebrecos, A., Picó, R., Sánchez-Morcillo, V. J., Staliunas, K., Romero-García, V., Garcia-Raffi, L. M.

“…The enhancement of sound inside a two dimensional exponentially chirped crystal during the soft reflections of waves is experimentally and theoretically…”
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Influence of periodicity on the reflection properties of finite periodic media by Cebrecos, Alejandro, Romero-García, Vicent, Picó, Rubén, Snchez-Morcillo, Vctor, Garcia-Raffi, Luis Miguel, Snchez-Prez, Juan Vicente, Staliunas, Kestutis

“…The dispersion relation of periodic systems, the well-known bands structure, gives the information about the propagating modes inside the media. These bands…”
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Level repulsion states and cavity modes excited by evanescent waves in sonic crystals waveguides by Romero García, Vicent, Garcia-Raffi, Luis Miguel, Vasseur, Jérôme, Hladky-Hennion, Anne Christine, Sanchez-Prez, Juan Vicente

“…The relevance of the evanescent modes in sonic crystals is theoretically and experimentally reported in this work. The complex bands structure, kω, calculated…”
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Validation of symmetry-induced high moment velocity and temperature scaling laws in a turbulent channel flow by Alcántara-Ávila, Francisco, García-Raffi, Luis Miguel, Hoyas, Sergio, Oberlack, Martin

“…The symmetry-based turbulence theory has been used to derive new scaling laws for the streamwise velocity and temperature moments of arbitrary order. For this,…”
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